troubleshooting Question

Convert Haversine formula from PHP for use with SQL

Avatar of sluggo050499
sluggo050499 asked on
Microsoft SQL Server
3 Comments1 Solution1081 ViewsLast Modified:
The Haversine formula calculates the distance between 2 locations utilizing lat/long.  I have a PHP script that works to get this.  It uses lat/long in degrees and returns the distance in miles.
# Where:
#  $l1 ==> latitude1
#  $o1 ==> longitude1
#  $l2 ==> latitude2
#  $o2 ==> longitude2
function haversine ($l1, $o1, $l2, $o2)
     $l1 = deg2rad ($l1);
     $sinl1 = sin ($l1);
     $l2 = deg2rad ($l2);
     $o1 = deg2rad ($o1);
     $o2 = deg2rad ($o2);
     return (7926 - 26 * $sinl1) * asin (min (1, 0.707106781186548 * sqrt ((1 - (sin ($l2) * $sinl1) - cos ($l1) * cos ($l2) * cos ($o2 - $o1)))));

I have a database with id, latitude and longitude.  I want to enter the miles and the second lat/long and have the query return all of the id's that have that distance or less.
Brendt Hess
Senior DBA

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